2018 Genesis G90 Reliability ReportCommon Problems, Repair Costs & Expert Verdict
Quick Facts · 2018 Genesis G90
- Has 4 NHTSA recalls on record — the most notable involves the engine and engine cooling:exhaust system:manifold/header/muffler/tail pipe.
- Outscores the 2017 Genesis G90 by 7 points — one of the stronger nearby years to consider.
- The system most likely to surface first: infotainment & electrical glitches (minor severity).
Should You Buy the 2018 Genesis G90?
The 2018 Genesis G90 stands out as one of the most robust and value-packed luxury sedans you can buy on the used market. Its powertrains are exceptionally durable, and while some minor electronic quirks can arise, major mechanical failures are remarkably rare, making it a truly confident purchase for discerning buyers.
The 2018 Genesis G90 is an exceptional used luxury car, offering a blend of robust reliability, opulent comfort, and incredible value that's hard to beat. Its well-engineered powertrains and solid construction mean major mechanical headaches are rare, allowing owners to enjoy premium motoring without fear of constan…
Best Model Years
2017-2023 (First Generation)
Years to Avoid
None in particular for the first generation G90; all model years are strong contenders.
Biggest Strengths
- Exceptional powertrain durability (both V6TT and V8)
- High-quality interior materials and construction
- Sophisticated, comfortable ride quality and quiet cabin
Top Risk Areas
The systems that tend to fail first on the 2018 Genesis G90, with the typical mileage window when each becomes a concern. Detailed repair-cost ranges and exact what-to-check inspection notes are in the full report.
Owners occasionally report frozen screens, Apple CarPlay/Android Auto connectivity issues, or unresponsive buttons. While not critical, these can be annoying and sometimes require a system reset or software update.
Due to the complexity of features like adaptive cruise control, lane-keeping assist, and blind-spot monitoring, sensor calibration or occasional false warnings can occur, sometimes requiring dealer diagnosis.
Given the G90's substantial weight and refined performance, brake pads and rotors can experience accelerated wear compared to lighter vehicles, particularly with aggressive driving. This is more of a maintenance item than a defect.
2018 Genesis G90 Mileage Danger Zones
The mileage windows when the 2018 Genesis G90 most commonly needs attention. Plan ahead, budget accordingly, and inspect before you cross each threshold.
Low Risk Zone
At this mileage, the G90 is still very fresh. Focus on ensuring all factory scheduled maintenance has been completed, particularly oil changes and tire rotations. You might consider an initial brake inspection due to vehicle weight.
Maintenance Zone
This mileage typically marks a more comprehensive service. Focus on all fluids (transmission, differential, coolant), spark plugs (for V6TT), and a thorough inspection of suspension components and brakes.
Elevated Risk Zone
While still very reliable, components that wear over time will start to show their age. Look for signs of wear in suspension bushings, engine belts, and hoses. Electrical components might have minor issues.
High Risk Zone
Beyond 120,000 miles, the G90 still performs well if diligently maintained. However, expect to address more significant wear items. Continue diligent fluid changes and be prepared for potential replacements of major suspension components…
2018 Genesis G90 Ownership Cost Outlook
What it typically costs to keep the 2018 Genesis G90 on the road. Full 5-year cost-of-ownership projection and major-failure-risk forecast are in the report.
Annual Maintenance
$500-750
Moderate Repairs
$600-1,800 occasionally (e.g., ADAS sensor, suspension work)
How Long Does the 2018 Genesis G90 Last?
For maximum peace of mind, aim for examples with less than 70,000 miles and a documented service history. However, well-maintained G90s can easily exceed 150,000 miles with proper care.
What 2018 Genesis G90 Owners Actually Say
What Owners Love
- Incredibly smooth, quiet, and comfortable ride quality
- Exceptional value for money on the used market
- Powerful and reliable powertrains (both V6TT and V8)
- Luxurious, well-appointed interior with high-quality materials
Common Frustrations
- Below-average fuel economy, especially with the V8
- Less brand prestige compared to established German rivals
- Infotainment system can be occasionally glitchy or slow
- Large size can make parking and maneuvering in tight spaces challenging
Who Should Buy the 2018 Genesis G90?
Best For
- Buyers prioritizing luxury, comfort, and quietness over outright sporty handling
- Individuals seeking exceptional value in the used luxury car market
- Those who appreciate strong reliability and lower maintenance costs than typical German rivals
Not Ideal For
- Performance driving enthusiasts seeking aggressive handling and feedback
- Buyers sensitive to fuel economy costs
How the 2018 Genesis G90 Compares to Rivals
The G90 remarkably outperforms many European luxury rivals in long-term reliability and cost of ownership, often rivaling Lexus. Its primary 'weakness' compared to ultra-reliable mainstream sedans is the inherent complexity and higher repair costs associated with any premium v…
More Reliable Than
- Mercedes-Benz S-Class (W222, early models)
- BMW 7 Series (F01/F02)
- Audi A8 (D4)
Comparable To
- Lexus LS (XF40)
- Acura RLX
NHTSA Recalls
4 recalls on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
Hyundai Motor America (Hyundai) is recalling certain 2018 Genesis G80 and 2017-2018 Genesis G90 vehicles equipped with 3.3 liter turbocharged engines. The turbocharger oil supply pipe may have a loose seal, causing oil to leak onto the exhaust manifold.
VISIBILITY:WINDSHIELD
Hyundai Motor America (Hyundai) is recalling certain 2018 Hyundai Genesis G80 and Genesis G90 vehicles. The windshield and rear window on these vehicles may have been installed with incorrect primer, potentially reducing the glass bonding strength.
What breaks on the 2018 Genesis G90?
Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.
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Genesis G90 by Year
Compare KeepScores across nearby years of the Genesis G90. Click any year for its full report.
If You're Considering This, Also Look At
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Frequently Asked Questions
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